Circular polarized antenna's also known as "clover leaf antennas" are a great way to increase the performance of your FPV system. The circular polarization helps reject “multipath interference”, a problem that plagues standard dipole stock antennas. Proven to increase range and video clarity circular polarized antennas have become the standard aftermarket 'essential' upgrade for modern FPV systems. These antenna have 3 lobes which are protected by a 2 piece plastic molded cover that clips together.